Saw-sharpening device



(No Model.)

G. G. LYNCH & P. LANTON.

SAW SHARPBNING DEVICE.

No. 348,168. Patented Aug. 24, 1886.

UNITED STATES PATENT OFFICE..

GARRY GERALDAS LYNCH AND PETER LANTON, OF ILLAVARD, LOUISIANA.

SAW-SHARPENING DEVICE.

SPECIFICATION forming part of Letters Patent No. 348,168, dated August24, 1886.

Application filed February 0, H86. Serial No. 191281. (No model.)

To @ZZ whom t may concern:

Be it known that we, GARRY GERALDAS LYNCH and PETER LaN'roN, citizens ofthe United States, residing` at lllaward, in the parish of East Carrolland State of Louisiana, have invented certain new and usefulImprovements in Saw-Sharpeners; and we do hereby declare that thefollowing is a full,clear, and exact description of the same, referencebeing had to the annexed drawings, making a part of this specification,and to the letters and figures of reference marked thereon.

Figure l of the drawings is a side elevation of our invention, showingit in position for use on a gin-saw; Fig. 2, asimilar view showing thereverse side of the device with a portion broken away; Fig. 3, a detailsectional View taken on line x x of Fig. 2; Fig. 4, a

' similar View taken on line y y of same figure,

and Fig. 5 a detail View of the brace.

The present invention has relation to certain new and usefulimprovements in saw- Sharpeners, and refers more particularly to thatclass adapted for sharpening saws used in ginning cotton, wherein it isof the greatest importance that the gum or bottom of the notch betweenthe teeth be as round as possible, and that there be no sharp edges tocut or injure the ber.

The object of the invention, therefore, is to provide a simple andeffective device for attachment to the saw and the ile of the device sounder control that a clean, round, smooth gum is made that will notinjure the fiber and with comparatively little labor by the operator,which objects are attained by the construction substantially as shown inthe drawings, and hereinafter described and claimed.

In the aceompanyi ng drawings, A represents a stationary frame, to whichis pivoted a bracket, B, the arms of which form bearings for an uprightshaft, a, and to the lower end of this shaft is att-ached the file C. Ahandle, l). at the upper end of the shaft, enables it to be rotated, andwith it the file C, which may be turned from side to side by the lateralswinging of the bracket B, thus enabling the bottom and sides of thenotch or gum of the saw to be rounded smoothly and cleanly. The pivot con the bracket B depends from a tapering block, d, held in a socket uponthe under side and lower end of the bracket by keys e, one on each sideof the block, the object of which is to adjust the position of thebracket from a perpendicular to an angle, so as to adapt the le todifferent thicknesses or sizes of saws. The upper pivot, j', dependsfrom the end of a liat spring, g, the opposite end of said spring beingattached to the upper end of the frame A, andthe pivot, extending downthrough an eye, h, forms the stationary axis of the bracket. By slightlyraising the free end of the spring gthe pivot f is elevated sufficientlyto admit of the bracket being removed for adjustment, as hcreinbeforedescribed.

To the bracket B is pivoted a bell-crank hand-lever, D, the lower endthereof engaging a notched slide, E, by which means it can be movedeither back or forth,to loosen or tighten the pivoted or hinged jaw F ofthe clamp upon the saw G.

The meeting ends of the slide E and jaw F are wedge shape, and overlapeach other, as shown in Fig. 4. The bolts ij, which pass through thestationary clampbar H, also pass through slots in the slide and pivotedjaw of the clamp.

To loosen the clamp F, the lower end of the bell-crank hand-lcver l) ismade to engage with the notch in the sliding wedge E, as

`shown in Fig. 1, and the handle end of the lever raised. This will pushback the sliding wedge and release the clamp upon the saw and admit ofthe device being moved and the file placed iu the gum of the saw.

After the device is in position on the saw, and the le in the gumthereof, the file is revolved by means of the handle on .the shaft untilthe desired depth is cut, after which the bell-crank hand-lever israised to loosen the clamp, and the file placed in the next gum, thefile being moved from side to side by means of the handle end of thebell-crank lever at the same time it is being revolved, thus eutting thegum out round and smooth 011 both sides.

One end of a rest, I, is connected to the frame A, and is adjustable bymeans of the slot 7'.' and bolt and nut l m, so as to adapt it to sawsof different sizes. The rest I is curved,

as shown, and its free end preferably slotted 4^, straddling the thirdsaw to the right or left to t over the saw or straddle it, and in thisslot or bifurcated end of the rest is a pivoted bar, n, which restsdirectly upon the perimeter of the saw.

'Io the frame A is pivoted a feeding-pawl, o, its free end engaging withthe teeth of the saw, as is common in this class of devices.

Although We have shown and described our device as applied to gin-saws,itis equally applicable to all classes of saws; and to steady theVdevice when in use We employ a brace, K, consisting of an arm, p, andslotted head r, the arm being held to the frame A by bolt s and nut t.The brace thus connected is at right angles to the frame and the slottedhead of the frame, and is adjustable by means of 'the slot u in the arm.

We claim- I. In a saw Sharpener, the combination, with a suitable frameand clamping device for securing it to the saw, of a swinging bracketsupported in said frame, and a rotary shaft carrying the iile and havingits bearings in the bracket, substantially as and for the purpose setforth.

2, In a saw sharpener, a suitable franie and means for attaching it tothe saw, in combination with a swinging bracket provided with anadjustable pivot, and a rotary shaft carrying the file and having itsbearings inv the bracket, substantially as and for the purposespecified.

3. In a saw-Sharpener, a suitable frame and rotary shaft carrying afile, in combination with a clamping device for securing the frame tothe saw, consisting of a stationary clamparin and a pivoted or hingedjaw and a slide, l

said jaw and slide having Wedge-shaped ends which overlap each other,substantially as and for the purpose described.

4. In a saw-Sharpener, a suitable frame, a swinging bracket supportedtherein, and a rotary shaft carrying the file having its bearings in thebracket, in combination with arest adjustabl y connected to the frameand having a slotted extremity, and a bar pivotedtberein, substantiallyas and for the purpose set forth.

5. In a saw-Sharpener, a frame having a swinging bracket supportedtherein having a rotary shaft carrying a file, in combination with abell-crank hand-lever pivoted to the bracket and a clamping device forholding the frame on the saw, consisting of a stationary clamp-arni anda pivoted or hinged jaw wedge shape at its end, and a Wedge-shape slideoperated by the lever, substantially as and for the purpose specified.

6. In a saivsharpener, a suitable frame carrying the shaft and le and aclamping device Ior securing said frame to the saw, in combination witha brace consisting of an arm and slotted head, said brace being adjustably connected to the frame at right angles thereto, whereby theslotted head may straddle the saw to the side of the one beingsharpened, substantially as and for the purpose set forth.

In testimony that we claim the above we have hereunto subscribed ournaines in the presence of two witnesses.

GARRY GERALDAS LYNCH. PETER LANTON.

Witnesses;

J. C.. Boss, W. S. BROWN.

